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Corrosion Characteristics of Ni-Cr and Co-Cr Alloy Used as a Dental Prosthesis and Its Adhesion to Porcelain
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  • Journal title : Corrosion Science and Technology
  • Volume 15, Issue 3,  2016, pp.141-146
  • Publisher : The Corrosion Science Society of Korea
  • DOI : 10.14773/cst.2016.15.3.141
 Title & Authors
Corrosion Characteristics of Ni-Cr and Co-Cr Alloy Used as a Dental Prosthesis and Its Adhesion to Porcelain
Kim, Kijung; Choi, Byungki; Oh, Doorok; Choi, Byung-Sang;
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 Abstract
By using Ni-Cr and Co-Cr alloys, porcelain fused to metal (PFM) samples were prepared to examine the interface and the surface corrosion behavior. The potentiodynamic polarization analysis showed that the corrosion current density of Co-Cr alloy () was three times lower than that of Ni-Cr alloy () at room temperature. A dental prosthesis consisting of the porcelain fused to Ni-Cr alloy extracted from a patient after approximately four years of usage was examined to assess its resistance to corrosion. OM and SEM images of the metal part revealed a typical pitting corrosion. As compared to porcelain fused to Ni-Cr alloy having a thick layer () of oxide at the interface, a relatively thin oxide layer (less than ) was formed on Co-Cr alloy, indicating that the interface between Co-Cr alloy and porcelain may have a better adhesion strength than the interface between Ni-Cr alloy and porcelain.
 Keywords
dental prosthesis;porcelain fused to metal (PFM);pitting corrosion;Ni-Cr;Co-Cr;
 Language
Korean
 Cited by
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